Coke-oven cover.



No. 809,344. PATENTED JAN. 9, 1906. A. H. lWALSTROM. GORE OVEN GOVBR.

APPLICATION FILED DEO. 12. 1904.

2 SHEETS-SHEET l.

W/TNESSES: l/WENTH No.ao9,s44. 1 PATBNTBD JAN.9,19os,

A. H. wALsTRoM.

COKE OVEN GO i APPLICATION FILED DE 1904.

2 SEEETS- SHEET 2.

ANDREW H. WALSTROM, OF BIRMINGHAM, ALABAMA.

COKE-OVEN'COVER.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed December 12,1904. Serial No, 236,573,

To all whom, it m/rfl/ concern:

Be it known that I, ANDREW H. WALsTRoM, residing at Birmingham, in thecounty of Jefferson and State of Alabama, have invented certain new anduseful Improvements in Coke-Oven Covers, of which the following is aspecification. v

- My invention comprehends a cover of circular or polygonal shape inplan view and dome-like in vertical section composed of a plurality ofsurfaces on different planes, all of which radiate to a common centerand toward the center of the oven, over which the said cover may beplaced. Such cover has its radiating-faces so correlatively arrangedwhereby all parts of the cover will be eX- posed to practically the sameheat-rays when the cover is either wholly or partially located over theoven, and the heat from the oven is so distributed by reason of thedifferent facings of the vcover exposed to the heat-rays of the coverthat the contraction and expansion of the cover is so taken care of asto prevent buckling.

Subordinately, my invention consists in an oven-cover embodying thepeculiar and novel arrangement of parts hereinafter fully described,pointed out in the claims, and illustrated in the accompanying drawings,in which- Figure l is a vertical section of a coke-oven with my improvedcover applied for use. Fig. 2 is a similar view, the cover being butpartially over the oven to open part thereof to atmosphere. Fig. 3 is aplan view of the preferred form of my improved cover. Fig. 4 is adiagram illustrating the geometrical arrangement of the diHerent radiiof the surface of the form of cover shown in Figs. l and 3. Fig. 5 is avertical section, and Fig. 6 is a plan view of a modified constructionof my improved oven-cover. Figs. 7 and 8 are sectional and plan views,respectively, of a fur.- ther modification of my invention hereinafterreferred to.

In the generic arrangement of my invention I provide a cover of adome-like shape inl cross-section having a plurality of surfaces ofdifferent radii or planes all of which radiate toward a common center,and in the preferred construction, as shown in Figs. l and 2, the coverA is of a circular shape in plan vieW and of a dished or dome shape incrosssection, and ,it is of a size to snugly fit over and close thethroat of the coke-oven B, which may be of any of the ordinary types.

The cover A is formed with a plurality of surfaces that merge with oneanother to produce, as it were, a continuous surface over the entireinternal face ofthe cover; but the several surfaces (indicated by 1 2 3A 5 in the drawings) are correlatively so disposed that they all reflecttoward the center of the oven in crossed rays, as indicateddiagrammatically in Fig. 4.v By reason of the peculiar construction ofthe cover-that is, forming the same of differently-curved subsurfaces,all of which radiate toward the center-I provide against an excessiveheating of any one part of the cover and the consequent crackingthereof, as well as providing for the uniform distribution of all theheat-rays from the oven that enter under the cover, even when but oneportion thereof is held over the oventhroat and a portion of the saidoven is open to atmosphere. By reference to Fig. 4 it will be readilyapparent that while the radii of the several different subsurfacescross, those at one side of the central radial surfaces (designated 1)cross at that side only, while those at the other side correspondinglycross on said other side only. --i

A cover such as before described and illustrated in Fig. l has fivediiferent surfaces, each on a different radius, and the severaldifferent surfaces in the preferred construction are so disposed thattheir lines of juncture lie in parallel horizontal planes and that the'radius of each successive surface increases from the base toward thetop of the cover.

Another and important advantage of my invention is that when drafting anoven during different stages of burning the operator in charge sets thecover but partially over the oven, as shown in Fig. 1, and leaves, say,one fourth to one-half of the oven-throat open to the atmosphere. Whenin this position, by reason of the peculiar arrangement of the facing onthe inside of the cover, all parts of the cover will be practicallyexposed to the same heat-rays, although but one-half of the cover isdirectly over the top of the oven, since the different radial faces ofthe cover serve to cause a crossed radiation of the direct raysemanating from the oven and that enter under the cover and toward thecenter of the cover, from whence they reflect back over that part of thecover that is not directly over the oven.-

of the cover is required during the operation of burning in the coal,and when this is accomplishecl the cover is then placed entirely IOG Thepositionlast stated I I o i over the oven until it is ready to draw, atwhich time the coke in the oven will be at white heat.

In Figs. 7 and 8 is illustrated a slightlymodified form of my inventionin which the cover has a polygonal shape in plan view, the central orcrown portion a of which is curved on a twelve-inch radius, and theremainder is composed of four tiers of faces, and each tier comprises aplurality of faces (twenty being shown) on different angles, but mergingwith one another and retaining` the same angles to each other.

In Figs. 5 and 6 I have illustrated a further modification of myinvention which embodies substantially the construction shown in Figs. 7and 8, the difference being that the cover is round in plan view and theseveral horizontal tiers of faces designated a', a?, a3, and a4,beginning from the bottom up to the central curved top a, are disposedat different angles to each other, but extend entirely around and arenot broken up into a number of independent surfaces, as in Figs. 7 and8.

By providing a cover having a plurality of differentiallyarrangedsurfaces, each struck on a different radius or inclined at a differentangle with the cross-sectional shape of'substantially spherical shape, Ifind that by scaling the edges of the cover with sand. the said coverseldom gets hot, although the oven contents be at White heat.

Another and very important advantage obtained in the practicalapplication of my invention is that the cover is much lighter in weightthan that of the ordinary coke-oven cover, which usually Weighs from onehundred and fifty to two hundred pounds, whereas in my construction thecover weighs between twenty-hve and thirty pounds, thus making it easyto handle and economical in its manufacture.

Having thus described my invention, what I claim, and desire to secureby Letters Fatent, ist

l. An oven cover having a substantial dome shape, whoseradiating-surface co1n` prises a plurality of distinct circularsubsurfaces.

2. An oven cover having a substantial dome shape, Whoseradiating-surface cornprises a plurality of distinct circularsubsurfaces, integrally formed with each other.

3. A coke-oven cover of substantial dome shape composed of a pluralityof curved surfaces of different radii having their centers of curvatureregularly arranged around the axial line of the oven-cover substantiallyas shown and described.

4. A dome-shaped oven-cover formed of a single member having a pluralityof longitudinally and transversely curved circular surfaces, eachsurface being curved on independent radii.

5. A dome-shaped oven-cover of an integral structure comprising aplurality of subsurfaces each formed as a circular band, each ofdifferent radii of curvature and each curved transversely on differentradii, the radius of the transverse curvature of each successive surfaceincreasing from the base of the cover toward the top thereofsubstantially as shown and described.

6. A dome-shaped oven-cover of an integral structnre comprising aplurality of circular subsurfaces successively joining with each other,the line of juncture of each surface with the other lying in parallelhorizontal planes substantially as shown and described.

7. An oven-cover of an integral structure and of substantial dome shape,comprising a plurality of surface bands each of which bands beingtransversely curved, the radius of transverse curvature of eachsuccessive band being different from the other, the lines of juncturebetween successive bands forming circles and lying in parallelhorizontal planes, substantially as shown and described.

8. An oven cover having a substantial dome shape whose radiating-surfacecornprises a plurality of distinct subsurfaces integrally formed witheach other, the lines of juncture between the subsurfaces lying inparallel circles around a common aXis.V

ANDREW H. WALSTROM.

Vitnesses:

R. C. REDUs, EDWARD T. RICE.

